“I’m not sure if different EQing would be a good idea when working with wedges (we don’t use IEM). In a smaller Venue it could lead to a rather inhomogeneous sound…”
I wouldn’t worry about that. Even if your source EQ is the same, it’s going to be standard to have different output EQs on the wedges compared to the main PA. You’ll likely have to carve up the wedge EQ to get more gain before feedback.